Storage battery



July 15, 1952 c, PAHLER 2,603,670

STORAGE BATTERY Filed Dec. 2, 1949 IN VEN TOR. C(kris/apher F Pahler.

AZTOAWEY Patented July 1 5, 1952 Application December w The present invention [C hi-istepher mam, ste -saw lls.

2,mia seria nmisopsiz.

" cams; (cries-+156) 'f f I I relates to improvements I in storage batteries and. has particular reference tova. case for astoragebattery- The, principal object of the inventionxis to provide means for draining astorage battery from the bottom for removal of sediment and for washingfoperationswhereby the manufacture of a battery may be simplified, shorts may be substantially prevented and the life of a battery may :be. greatly extended.

has been completed the drain may be opened anufactfire the prac-Y .After the pickling process and the electrolyte used during the processdrawn off, whereupon the cells may be washed. from the top by water under pressure to force all the sediment from the elements through the bottom drain.

Upon completion of this process the drain may be closed and the case then may be filled with the permanent electrolyte.

During the life of the battery it often becomes desirable to drain off the sediment to eliminate shorts and for repair and re-fill operations, and my bottom drain for the battery is intended to greatly facilitate operations of this character.

In carrying out my invention I propose to provide a drain hole in the bottom of the battery case, with a removable plug for closing the same.

I further propose to provide means in connection with the bottom of the case for causing the sediment or the liquid carrying the same to naturally gravitate toward the drain hole.

I further propose to arrange the plug for the hole in such a manner that no part thereof projects beyond the lower face of they bottom so that the plug in no' way interferes with the mounting of the battery in'a cage or on the floor.

And finally, I propose, in a to arrange for a separate drain for each of the cells and for a common slope extending throughout-the length of the battery for causing the sediment in each cell to gravitate to its respective drain hole.

While my invention is principally intended to form an integral part of a battery case, I also provide modifications whereby the invention may be readily applied to a conventional case.

Further objects and advantages of my invention will appear as the specification proceeds, and the novel features of my invention will be fully defined in the claims attached hereto.

and the mud rack multi-cell battery,

of my invention is illus- The preferredform .trated in the accompanying drawing,

Figure-v 1 shows an isometric viewof i a battery case vmade in accordance with my invention, a

portion being broken away to disclose interior,

:construction; I I v Figure 2 a top plan view of the botto bat eryica am Figure 3, aside view of the bottomg Figure L- an end view of the same iifigurefi, a bottom plan view of a bottom plate adapted-for insertfon in .a conventional battery,

one of-these platesbemg provided for in each cell,.and in: v I 'Figure 6, a fragmentary isometricviewcof a battery case having my invention appliedto a -conr nt on -c se a iq t on f he-ease b i roken Y While; haveshown; only thelpreferredforms of my invention- I wish to have itvunderstood that -various 1 changes and modificat'ions may be ,made 3 within the scope; of the" claims attached m re.- it' th i new were eer invention.

Referring to the drawing in detail, my battery case I may be of any suitable conventional con-;

struction, except for the features hereinafter pointed out, and .comprises a bottom 2, two parallel sides 3, two parallel ends 4, and a conventional cover, not shown, having conventional filler holes. The case may be subdivided by means of partitions 5 to form a plurality of compartments or cells adapted to receive the plate units (not shown) in accordance with conventional practice.

The bottom 2 maybe formed integral with the case or as a, separate unit, as shown, to be secured to the case in any suitable manner. The bottom of this invention is preferably made somewhat thicker than in conventional practice, and its upper face is made to slope downward from the side edges toward the transverse median line 6, the slopes being shown at 1. Along the median line I provide a drain hole 8 for each cell, the slopes serving tocause sediment to gravitate toward the drain hole.

In the lower face of the case bottom I provide an enlarged recess 9 concentric with each drain hole to receive the head In of a plug 1 l, theshank H of the'plug being adapted for threading into the drain hole for closing the latter. The recess 9 for each plug is deep enough to accommodate the entire plug head, and is large enough to allow of access to the head for screwing and unscrewing operations. Thus, no portion of the plug head extends below the bottom face of the bottom.

A series of mud racks I2 is arranged on each side of the median line to serve as rests for the plate assemblies in each cell, the racks of each series being alined with one another and spaced in which l I l. l}; 3 from the median line as shown. The mud racks in each series are spaced from one another as at I3 to receive the lower edges of the partitions 5, as shown,,a nd all the mud racks are recessed along the bottom, as shown at I 4, to allow offree flow of sediment toward the median line and toward the drain holes.

The bottom plate of my invention may be formed as an integral or permanent part ofthe 1 casein original case construction. If it is desired.

to apply my bottom plate to a conventional case, 1

I make the plate somewhat thinneras at [5 in Figure 6 to fit over the bottom plate 16 already present, the combined thicknesses being preferably made to correspond to that of the bottom plate 2 shownin the preferred form. .7 a

in this 'rorm'the drain holel 8 is' preferably 7 formedintheadded plate 15-; whilejthe recess 9 for accommodating the-plug head may be formed in the-lower plate l6. r i

In case it is desired to apply the bottom plates to the'cells individually, sectional plates may be provided as at j! in Figure 5 to=fit the cells, these plates being' preferably of the same thicknessas thejpl'a'te' of Figure 6, with the drain hole and 9" may extend through the entire thickness of the underlying plates. 1

1. ,-I n'a; storage battery, a rectangularc'ase having a bottom, side and end walls and at least one transverse partition for dividing the case into a plurality ;of compartments adapted to receive plate units and an electrolyte therein, said bottom having a bottom plate removably mounted thereon with the periphery of the bottom plate in close relation with the side and end walls, the upper .25 indicated at 8,and the recess of the underlying plate at 97".; It is apparent that the recesses 9' o f each partition-therein. I

, 4' surface of said bottom plate slanting from opposite side edges toward a median line running transversely to the partition, said bottom plate having a. drain hole for ,each compartment 10- cated along said line, said bottom having recesses aligned with said drain holes and being of greater diameter than said drain holes, remova'ble headed plugs for said drain holes with the Theadsjthereof arranged in said recesses and adapted to clear the lower face of the bottom, and mud racks secured to said bottom plate in each compartment on opposite sides of said median lineand spaced from the drain holes and having recesses along their bottom edges to allow mud to drain therethrough to-the drain holes.

7 2 The combination ofclaim 1 wherein the mud racks on each side'iof'the medianlline are spaced from the mud racks ofthe adjacent compartment to provide gaps adaptedto receive the lower end 7 CHRISTOPHER'F; PAHLER.

1 .RnFERiznoEs. CITED a a g The following referencesia're ot reicord in the file of this patent:

UNITED PATENTS Number Name I Date 7 1,154,372 Burritt Sept. 21, 1915 1,257,931 1 Rowell Feb. 26, 1918 1,290,487 Melia .l Jan. 7, 1919 1,330,634 Ivey et a1; Feb..10, 1920 71,577,912 ,ran' Mar. 23, 1926 Fong rcm PATENTS] Number Country; Date 

